Xcode - Special characters in JSON - ios

Question

Im loading a database from a website through JSON. When I download the database I use UTF8 to make all characters appear correctly and when I NSLOG them it all appears as it should. But when I analyze the data using JSON and afterwards try to filter out just a few of the words, the words with special characters become like this: "H\U00f6ghastighetst\U00e5g" where it should say: "Höghastighetståg".
I have tried to find a way to make the code convert the text back to UTF8 after filtering but somehow I can't make it happen. Would be really helpful for some answers.
NSError *error;
NSString *url1 = [NSString stringWithContentsOfURL:[NSURL URLWithString:#"http://www.pumba.se/example.json"] encoding:NSUTF8StringEncoding error:&error];
NSLog(#"Before converting to NSData: %#", url1);
NSData *allCoursesData = [url1 dataUsingEncoding:NSUTF8StringEncoding];
NSMutableDictionary *JSONdictionary = [NSJSONSerialization
JSONObjectWithData:allCoursesData
options:kNilOptions
error:&error];
if( error )
{
NSLog(#"%#", [error localizedDescription]);
}
else {
NSMutableArray *allNames = [NSMutableArray array];
NSArray* entries = [JSONdictionary valueForKeyPath:#"hits.hits"];
for (NSDictionary *hit in entries) {
NSArray *versions = hit[#"versions"];
for (NSDictionary *version in versions) {
NSDictionary *properties = version[#"properties"];
NSString *status = [properties[#"Status"] firstObject];
NSString *name = [properties[#"Name"] firstObject];
if ([status isEqualToString:#"usable"]) {
[allNames addObject:name];
}
}
}
NSLog(#"All names: %#", allNames);
}}

Answer 1

try with
+ (NSString *)utf8StringEncoding:(NSString *)message
{
NSString *uniText = [NSString stringWithUTF8String:[message UTF8String]];
NSData *msgData = [uniText dataUsingEncoding:NSNonLossyASCIIStringEncoding];
message = [[NSString alloc] initWithData:msgData encoding:NSUTF8StringEncoding];
return message;
}
or
+ (NSString *)asciiStringEncoding:(NSString *)message
{
const char *jsonString = [message UTF8String];
NSData *jsonData = [NSData dataWithBytes:jsonString length:strlen(jsonString)];
message = [[NSString alloc] initWithData:jsonData encoding:NSNonLossyASCIIStringEncoding];
return message;
}
and this code can help you
+ (NSDictionary *)jsonStringToObject:(NSString *)jsonString
{
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *jsonResponse;
if (data)
jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
return jsonResponse;
}
+ (NSString *)objectToJsonString:(NSDictionary *)dict
{
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
if (jsonData.length > 0 && !error)
{
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
return jsonString;
}
return nil;
}